The male definition of cockblocker is to sabatoge another guys chance of scoring with a chick. This concept was foreign to me until going out on occasion with my college roommates friends.

While one guy was is the bathroom, another guy would tell whatever girl was there things like... its a shame he has been unemployed for 3 years..... rough deal with that restraining order.... he doesn't pay his child support for his 4 kids........he is changing his colostomy bag...it wasn't his fault he caught herpes..... Stuff to that effect.. The girls wouldn't say anything when the guy comes out of the bathroom, the guy of course doesn't score.. then they never even tell the guy that was in the bathroom what they said to the girls.....

Shit is reprehensible..

Steve was a cockblocker when he told the bartender Paul was out on parole when he was in the shitter

A hot girl's ugly friend who has a chip on their shoulder about no one hitting on them, so they do everything in their power to stop their friend being nailed. also the friend might not want to leave them alone. female cock blockers can however be countered by "taking one for the team" this activity involves your friend drawing a short straw and having to go off with the cock blocker so that your path is clear

"damn, this bitch is cock blocking me at every turn, tim can you take one for the team?"
"I'll take down that cock blocker, now run free unhindered my freind, go deep!"